Washington: Repeated cycles of violence and conflicts are disrupting global economic growth and trapping 1.5 billion people in dire poverty, the World Bank has said.

In countries hit by repeated cycles of violence, poverty rates are up by more than 20 percentage points compared with other countries, says a World Bank report released on Monday.

Fixing the economic, political, and security problems that disrupt development and trap fragile states in cycles of violence requires strengthening national institutions and improving governance in ways that prioritize citizen security, justice, and jobs, says the 'World Development Report 2011: Conflict, Security and Development'.

The World Bank has called for development organisations to place a new emphasis on improving police protection to halt the violence gripping dozens of poor nations.

"If we are to break the cycles of violence and lessen the stresses that drive them, countries must develop more legitimate, accountable and capable national institutions that provide for citizen security, justice and jobs," World Bank President Robert B Zoellick said following the release of the report.

"Children living in fragile states are twice as likely to be undernourished and three times as likely to be out of school. And the effects of violence in one area can spread to neighboring states and to other parts of the world, hurting development prospects of others and impeding economic prospects for entire regions," he said.

Noting that military and development disciplines too often worked on separate paths, Zoellick called for bringing security and development together to break the cycles of fragility and violence affecting more than one billion people.

The report shows how 21st century organised violence appears to be spurred by a range of domestic and international stresses, such as youth unemployment, income shocks, tensionsamong ethnic, religious or social groups, and trafficking networks.

In citizen surveys done for the report, unemployment was overwhelmingly the most important factor cited for recruitment into gangs and rebel movements, the World Bank said in a statement.

"Risks of violence are greater when high stresses combine with weak capacity or lack of legitimacy in key national institutions, as shown by the recent turbulence in the Middle East and North Africa," it said.

The report notes that capable, legitimate institutions are crucial because they are able to mediate the stresses that otherwise lead to repeated waves of violence and instability.

"Elsewhere, gains made through peace processes are often undermined by high levels of organized crime. And countries where violence takes root fall far behind in development, with poverty rates more than 20 percentage points higher, on average, in countries where violence is protracted than in other countries," it said.